hi i'm new to the forum and have made a few purchases from the store connected with this site. i've been working on a power supply for a pc and was going to replace the bad caps. there were a bunch of 4 crammed up inside in a tight space where i couldn't see the voltage/values very well so i used a small mirror to shove in a crevace to see that it was 16v 3300uf. they looked all the same and noticed 2 to be the same so i went ahead and ordered 4 of these. upon getting these replacements, i take them out and find that the other 2 had different values even when they look identical. the other 2 are 10v 4700uf. they were situated where i couldn't read the values without removing them and i didn't remove them cause i wanted to do the job all at once. now that i know i have to remove them from now on i don't need to be told how stupid i was or anything. instead, i merely wanted to know if a higher voltage cap can compensate for the slightly lower uf. replaceing 10v 4700uf with 16v 3300uf. i do know that values can be higher and within 10% of its uf value but this was all with same value voltage examples. would a higher voltage compensate for lower uf. thanks in advance and be easy on me.
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Re: question about using different value caps
Higher voltage ratingdoesn't compensate for loss of capacity, they're 2 totally different properties of capacitors.
The voltage says the maximum voltage the capacitor can handle going through it, so it's safe to use the 16v rated capacitor to replace a 10v or 6.3v rated capacitor because in reality, the actual voltage going through the installed capacitor is below those values - in your case 5v or 3.3v.
The capacity value is about how much energy can the capacitor hold in it, sort of like the height of a cup of water. A bigger capacity means if your computer demands a lot of power suddenly, there is a bit of energy stored in that capacitor for a few microseconds until the power supply can ramp up and produce that higher level of converted power.
So if you're not using the power supply you have at close to it's maximum rating, you will almost definitely be fine replacing those 4700uF capacitors with 3300uF capacitors. -
Re: question about using different value caps
You didn't post the make or model, but if this is an Antec, search this forum and you will find that the Fuhjyyu 4700uF caps were probably inflated in terms of its capacitance value. Many have had success replacing it with a 3300uF.--- begin sig file ---
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Re: question about using different value caps
sorry for leaving out the details. this is an older model thermaltake 430w psu. it will be powering an intel mb with 945 chipset running 3.4ghz pentium D processor. it will also have 1 optical drive and 1 sata hdd and the video card will be a pci-e radeon x300. the system is nothing special other than it being a machine i'm building and donating to someone i know. i took some pictures.Attached FilesComment
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Re: question about using different value caps
Yes, 3300uF is fine for that wattage psu.
As they're near the red wires, this tells me those capacitors are most likely for the 5v rail, which isn't used so much on p4 motherboards anyway (as long as the board uses the 12v cpu 4pin connector). So 3300uF should be perfectly fine.Comment
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Re: question about using different value caps
thanks a bunch i appreciate the help. i'll let you guys know how its tests out afterwards.Comment
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Re: question about using different value caps
Moved outta the FAQ.sigpic
(Insert witty quote here)Comment
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Re: question about using different value caps
okay so upon initial test, everything seem to be running fine. i tested voltage on each rail and got great results. i will need to hook it up to the pc and put a load on it to fully test, but i'm assuming everything is great at this point. i am curious as to why manufacturers don't install fast blowing fuses on the rails since they do have max amperage ratings per rail. wouldn't this protect power supplies as well as computer components from damage? maybe they do have them and i'm not aware of them - not sure. i do recall seeing glass tube fuses in older older psu's in the past. anyhow i will report back if anything goes wrong from this point. again thanks for the help veterans!Comment
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Trying to fix this board, MSI K7T Pro2.
All Tayeh capacitors showed either as damaged or with uf values which were faf from what they should be so I have replaced them and all other capacitors except those big ones near CPU.
The motherboard powers on but doesn't post. My PCI bios code reader will most of the time dsplay some some kind of code if there has been no power to board for a while but I don't think those codes mean anything in this situation. If I power off the board and try powering it on the second time the code reader usually doesn't show anythin. Unplug... -
Dear reader
I am performing a repair on a Sony ICF-SW55, which includes recapping (some) of the SMD capacitors on the mainboard. I am looking for verification of their values. At the moment, I'm 95% sure I've got the right values, but it is hard to find some official, credible or multiple independant sources on this.
At the moment, I have selected replacements based on the following list of values:
3 x 470uF 10VDC
3 x 4.7uF 35VDC
4 x 47uF 50VDC
8 x 22uF 6.3 VDC
1 x 220uF 6.3VDC
5 x 100uF 6.3VDC
Which... -
Dear Alls,
For sure it id a stupid question, but help me to understand. I am in a Dell 2007WFP revitalizing project - searching reason why not starting. Some resistors needed to replaced is is obvious. When I have soldered some resistors the measured (with multimeter) values were sometimes rather different written on them. I supposed these are wrong units so I desoldered and made a checking measurement and voilá the values is the same is written on. This happens only in case of a few resistors, most have the same values (+/- 10%) are written on it. "strange" SMD resistors =>103... -
Here some measurements on HP Victus 16-d0500la, it might help someone, the values are on diode mode->mV and some lower ones on Resistance->Ω.
This specific laptop has an Intel i5 11400h + RTX 3050TI, the values are from a working laptop....03-13-2025, 03:16 AM -
mb GA-X5L
Good day to all, I need help with the values of the knocked down resistors.04-02-2025, 06:15 AM
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